feature(settings): Верстка экранов настроек

lib/screens/settings/cubit/settings_state.dart

@@ -0,0 +1,10 @@
+part of 'settings_cubit.dart';
+
+@freezed
+class SettingsState with _$SettingsState {
+  const factory SettingsState.initial() = _Initial;
+  const factory SettingsState.profile() = _Profile;
+  const factory SettingsState.notifications() = _Notifications;
+  const factory SettingsState.faq() = _Faq;
+  const factory SettingsState.about() = _About;
+}